Load Specifications
Load data in caliber 6 x 70 R with .243 | 95gr | Berger Classic Hybrid Hunter bullet and 9 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 14 and Hodgdon TrailBoss.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4064 | <<locked>> | 82% | 32,445 psi | 86% | 2454 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 34,084 psi | 90% | 2487 fps | 96% |
| Bofors RP3 | <<locked>> | 84% | 33,286 psi | 88% | 2480 fps | 95.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,098 psi | 90% | 1703 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 98% | 33,475 psi | 89% | 1729 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 33,779 psi | 90% | 2552 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 32,764 psi | 87% | 2369 fps | 99% |
| Somchem S365 | <<locked>> | 96% | 34,055 psi | 90% | 2559 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 86% | 33,069 psi | 88% | 2431 fps | 96.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4064 | <<locked>> | 80% | 30,458 psi | 81% | 2405 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,053 psi | 85% | 2438 fps | 95.2% |
| Bofors RP3 | <<locked>> | 82% | 31,256 psi | 83% | 2431 fps | 95% |
| Hodgdon TrailBoss | 8.7 gr | 80% | 25,541 psi | 68% | 1529 fps | 100% |
| ReloadSwiss RS 14 | 8.8 gr | 80% | 25,425 psi | 67% | 1562 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,776 psi | 79% | 2441 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,792 psi | 82% | 2323 fps | 98.6% |
| Somchem S365 | <<locked>> | 92% | 30,255 psi | 80% | 2457 fps | 95% |
| Vihtavuori N150 | <<locked>> | 84% | 30,777 psi | 82% | 2375 fps | 95.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 9 powders for 6 x 70 R loaded with the .243 | 95gr | Berger Classic Hybrid Hunter. Somchem S365 delivers the highest muzzle velocity at 2,559 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,559 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 9 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (260 MPa), the top charges use 86–90 %, leaving at least 10 % headroom. The 95.0 gr projectile in 0.243" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 6 x 70 R with the .243 | 95gr | Berger Classic Hybrid Hunter they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.